Ps 50:6

“"For, behold, truth You have loved: uncertain and hidden things of Your wisdom, You have manifested to me" [Psalm 51:6]. That is, You have not left unpunished even the sins of those whom Thou dost pardon. "Truth You have loved:" so mercy You have granted first, as that You should also preserve truth. Thou pardonest one confessing, pardonest, but only if he punishes himself: so there are preserved mercy and truth: mercy because man is set free; truth, because sin is punished. "Uncertain and hidden things of Your wisdom You have manifested to me." What "hidden things"? What "uncertain things"? Because God pardons even such. Nothing is so hidden, nothing so uncertain. For this uncertainty the Ninevites repented, for they said, though after the threatenings of the Prophet, though after that cry, "Three days and Nineve shall be overthrown:" [Jonah 3:4] they said to themselves, Mercy must be implored; they said in this sort reasoning among themselves, "Who knows whether God may turn for the better His sentence, and have pity?" [Jonah 3:9] It was "uncertain," when it is said, "Who knows?" on an uncertainty they did repent, certain mercy they earned: they prostrated them in tears, in fastings, in sackcloth and ashes they prostrated them, groaned, wept, God spared. Nineve stood: was Nineve overthrown? One way indeed it seems to men, and another way it seemed to God. But I think that it was fulfilled that the Prophet had foretold. Regard what Nineve was, and see how it was overthrown; overthrown in evil, built in good; just as Saul the persecutor was overthrown, Paul the preacher built. [Acts 9:4] Who would not say that this city, in which we now are, was happily overthrown, if all those madmen, leaving their triflings, were to run together to the Church with contrite heart, and were to call upon God's mercy for their past doings? Should we not say, Where is that Carthage? Because there is not what there was, it is overthrown: but if there is what there was not, it is built. So is said to Jeremiah, "Behold, I will give to you to root up, to dig under, to overthrow, to destroy," and again, "to build, and to plant." [Jeremiah 1:10] Thence is that voice of the Lord, "I will smite and I will heal." [Deuteronomy 32:39] He smites the rottenness of the deed, He heals the pain of the wound. Physicians do thus when they cut; they smite and heal; they arm themselves in order to strike, they carry steel, and come to cure. But because great were the sins of the Ninevites, they said, "Who knows?" This uncertainty had God disclosed to His servant David. For when he had said, before the Prophet standing and convicting him, "I have sinned:" straightway he heard from the Prophet, that is, from the Spirit of God which was in the Prophet, "Your sin is put away from you." [2 Samuel 12:13] "Uncertain and hidden things" of His wisdom He manifested to him.”

“Against You alone have I sinned Therefore, it is in Your power to forgive [me]. Even in my sin against Uriah, I sinned against You, for You warned against the matter. in order that You be justified in Your conduct like במנהגך, in Your conduct. I had the strength to overpower my evil inclination, but, so that they should not say, “The servant overpowered his master,”for I said to You (Ps. 26: 2), “Test me, O Lord, and try me,” and You tested me and I was not found perfect, in order that You should be justified and not I (Sanh. 107a). Another explanation: in order that You be justified in Your conduct If You forgive me, You will be justified in Your judgment against all the wicked who do not repent, so that they will not be able to say, “If we had repented, it would not have availed us.””

“"Behold, you have loved truth." He who wishes to make satisfaction must love the things that God loves. But God loves the truth of faith. Jn. 18: "Everyone who is of the truth hears my voice." Also, justice. Ps. 88: "Mercy and truth shall go before your face." And this is necessary in the penitent, that he punish in himself what he has done wrong. Also, confession is necessary, that he confess his sins.”

“"The uncertain things." Here he asks for total restoration. And first, he sets forth the hope he has. Second, his petition. And first, he sets forth the benefit received, through which he is raised to hope. Second, he sets forth his confidence, at "you shall sprinkle me." He commemorated the benefit of power when he said, "the uncertain and hidden things," because as king he had the benefit of prophecy. 2 Sam. 23: "The Spirit of the Lord spoke through me, and his word through my tongue." And he sets forth three things: namely, the matter of prophecy, its mode, and its cause. He shows the matter of prophecy when he says, "the uncertain and hidden things." Prophecy concerns these things, namely, uncertain and hidden things, which are comprehended by your wisdom. In us, something is unknown in two ways, yet known to God: either because of a defect, or because of an excess. Something future and contingent is unknown to us because of a defect, because it does not yet have a determined truth. Something is unknown to us because of an excess, namely the divine substance and things that exceed our capacity. Both were revealed to David through the spirit of prophecy. Amos 3: "The Lord God will not do a thing unless he has revealed his secret to his servants the prophets." "The uncertain things, therefore, you have manifested to me," that is, those things which by their very nature have variability; and these were revealed to him, as is clear in the Psalm. "Hidden things" are called those which exceed the eye of our mind. Job 28: "Wisdom is drawn from hidden things." Sir. 24: "I am in the highest places," etc.; and these are the things of the wisdom of God; as if to say: although they are hidden to us, nevertheless they are comprehended by your wisdom. And among the hidden things he commemorates the mystery of the Incarnation, which you also manifested to me. Also, the mercy of God is numbered among these, because it remits sins. But it is better to take it universally. The mode of revelation is set forth when he says, "you have manifested to me." There is a threefold mode of prophecy. One, in which a supernatural and intelligible truth is revealed under corporeal likenesses and images; and so Is. 6 says: "I saw the Lord sitting," etc. Another is that in which the revelation of a supernatural and intelligible truth is made without the cloud of imaginative fantasy; indeed, it is not yet revealed; and so the revelation was made to Moses, Num. 12: "Plainly and not through enigmas and figures he saw God." And such also was the revelation to David. 2 Sam. 23: "The God of Israel spoke to me." And below: "As the light of the dawn remains when the sun rises without clouds, it shines."”

“Only, or principally, who art the only God, (1 Timothy i. 17.; Worthington) the judge and witness of my crime. (Haydock) — David was a king, and acknowledged no judge among men. (St. Ambrose, c. x.) — Soli Deo reus est. (Cassiodorus) — Urias, whom he had injured, was no more. (St. Augustine) — The action had been done in secret: (2 Kings xii. 12.) but many began to suspect, and to blaspheme. (Haydock) — Judged. St. Paul reads thus, (Romans iii. 4.) though the Hebrew be, “when thou judgest.” St. Jerome has also judicaberis, so that we might infer, that the Hebrew is now incorrect, or that beshophtec means in judicare te. (Berthier) — Houbigant changes the order of the verses, “cleanse me from my sins, that thou mayst be blameless when thou comest into judgment: For I know,” &c. (Haydock) — Susanna was preserved from sinning by the thought of God’s presence, Daniel xiii. 25. — If David fell, he confessed his fault. (Berthier) — God is faithful to his promises, and desires the conversion of sinners, though some would represent him as cruel, and unconcerned about his creatures. The psalmist prevents this unjust inference, (Haydock) and proves, that God is both just and merciful. (Worthington) — He acknowledges his ingratitude, as the captives confess, that their sins have brought on them this chastisement, though they had not injured the Babylonians. (Theodoret) (Flaminius) (Calmet) — God had often promised pardon to those who truly repent. An appeal is made to his truth and mercy.”

“thou shalt make, &c.--may be taken to express God's gracious purpose in view of His strict requisition; a purpose of which David might have availed himself as a check to his native love for sin, and, in not doing so, aggravated his guilt. truth . . . and . . .wisdom--are terms often used for piety (compare Job 28:28; Psa 119:30).”